Physics – Fluid Dynamics
Scientific paper
2010-06-17
Physics
Fluid Dynamics
22 pages, 14 figures
Scientific paper
In this article we review several recently developed Lagrangian tools and propose their properly combined use for achieving a detailed description of purely advective transport events in general aperiodic flows. In particular, because of the climate impact of ocean transport processes, we illustrate an application on altimeter data sets over the area of the Kuroshio Current. First, a global Lagrangian descriptor recently described in (Mendoza & Mancho, 2010) is used on the dataset. Over the ocean surface a phase portrait is represented where the geometry of interconnected dynamical systems is visible. The organising centres of the flow are located at a glance: hyperbolic points -related to highly dispersive regions- and non-hyperbolic areas that are related to confinement regions. The phase portrait picture is very helpful to foresee which transport routes can be deduced from the stable and unstable manifolds of the easily identified distinguished hyperbolic trajectories (see Madrid & Mancho 2009) of the flow.
Mancho Ana M.
Mendoza Carolina
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